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    • 3. 发明公开
    • 직렬 디바이스를 루프백 테스팅하는 방법 및 장치
    • 串行设备的增强环回测试
    • KR1020080098454A
    • 2008-11-07
    • KR1020087026576
    • 2001-12-03
    • 테라다인 인코퍼레이티드
    • 파니스마이클씨.로빈스브래드포드비.
    • G06F11/00G06F11/26G06F11/22G01R31/28
    • G01R31/31716G01R31/3004G01R31/3016H04L1/243
    • An instrument for economically yet thoroughly testing serial ports employs a receiver and a transmitter. The receiver can be coupled to a TX line of a serial port for receiving a serial bit stream. The transmitter can be coupled to an RX line of the serial port for generating a serial bit stream. The receiver is coupled to the transmitter for establishing a loopback connection between the TX and RX lines of the serial port. A time distortion circuit and a selector are interposed between the receiver and the transmitter. The time distortion circuit adds predetermined amounts of timing distortion for testing the serial port. The selector selects between the receiver and a direct input, which provides an algorithmic test signal. The algorithmic test signal differs from the input serial bit stream received by the receiver to allow the TX and RX lines to be independently tested.
    • 经济而彻底测试串口的仪器采用接收机和发射机。 接收机可以耦合到用于接收串行比特流的串行端口的TX线路。 发射机可以耦合到串行端口的RX线路,用于产生串行比特流。 接收机耦合到发射机,用于建立串行端口的TX和RX线路之间的环回连接。 时间失真电路和选择器插在接收器和发射器之间。 时间失真电路增加了测试串行端口的预定量的定时失真。 选择器在接收机和直接输入之间进行选择,提供算法测试信号。 算法测试信号不同于接收机接收的输入串行比特流,以允许独立测试TX和RX线路。
    • 5. 发明授权
    • 높은데이타속도로동작하는자동테스트장치용타이밍발생기
    • KR100389608B1
    • 2003-08-19
    • KR1019970706808
    • 1995-12-05
    • 테라다인 인코퍼레이티드
    • 로빈스브래드포드비.브라운벤자민제이.라이쳐트피터에이.
    • H03K5/13
    • G01R31/2841G01R31/31922H03K5/131
    • Automatic test equipment with a programmable timing generator. In the timing generator, the required delay is split into a course delay, a frequency adjustment delay, and a fine delay. The fine delays for successive cycles are temporarily stored. As the course delays pass, the fine delays are retrieved and used to generate edge signals. The frequency adjustment delay is used to offset the time at which the fine delay is retrieved by a fraction of a the resolution of the course delay. This arrangement allows the fine delay values to be retrieved at a higher rate than the rate at which the signals representing the required delays were generated. With this arrangement, the edges can be generated in a high frequency burst mode even though much of the timing generator is implemented with circuitry that has a lower operating frequency. A significant cost savings results by providing high frequency operation with less expensive components of lower operating frequency.
    • 带可编程时序发生器的自动测试设备。 在定时发生器中,所需的延迟被分成路由延迟,频率调整延迟和精细延迟。 临时存储连续周期的精确延迟。 当路线延迟通过时,细调延迟被检索并用于生成边缘信号。 频率调整延迟用于偏移检索精细延迟的时间,其中延迟时间的分辨率为分数的一小部分。 这种安排允许以比表示所需延迟的信号的产生速率更高的速率来检索精确的延迟值。 利用这种安排,即使大部分定时发生器都采用具有较低工作频率的电路来实现,也可以以高频突发模式产生边沿。 通过使用较低工作频率的较便宜组件来提供高频操作,从而节省了大量成本。